Richard Harrison wrote:
Given a perfect transmission line with a complete reflrction, a length
can be found which produces a reflection with with the same phase and
magnitude as that of the generator. With equal and same phase volts on
either side of the generator/line junction, current does not flow.

*Net* current doesn't flow. But a circulator and load will
separate the forward component from the reflected component.
For instance, at a point on a transmission line where the
net current is zero, the forward current may be 100 amps and
the reflected current may be 100 amps, just out of phase with
each other.

In your above example, if the source is a signal generator
equipped with a circulator and load resistor, the net current
at the signal generator terminals can be measured to be zero
while the circulator resistor is smoking. Thus the difference
between distributed networks and lumped circuits.
--
73, Cecil, http://www.qsl.net/w5dxp

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